Recuperative oil burner



- June 3, 1930.

R. c. HOPKINS RECUPERATIVE OIL BURNER Filed O61'n l, 1925 iiiiiiaiiiiiiiiiiil Awe/f Hop/fing KO: nui

Patented June 3, 1930 ROBERT c. HOPKINS, orALLIANCE, oHIo BueuPraaiirrvn oir. BURNER.

Application lec October The invention is a continuation of the common subject matter of my copendingapplication Serial No. 2,061 filed January 13, 1925, and'relates to oil burners of the class wherein oil is mixed with a blast of air so as to be discharged and burned in combustible mixture therewith, and more particularly to an oil atomizer located within the burner.

The object of the improvement is to provide a burner having an oil reservoir located adjacent to the nozzle of the burner and connected with an oil supply; one or more troughs, open on the furnace side, forming communication between the oil reservoir and the nozzle of the burner, provision belng made for passing a blast of heated air through the burner and around said trough or troughs, a communication being provided between the air blast and the oil reservoir to prevent the formation of a vacuum aroundV the open side of the trough.

An embodiment of the inventionis illustrated in the accompanylng drawing, 1n

which Figure 1 is a longitudinal sectional view as on the line 1--1 of Fig. 2, through a burner embodying the invention ;v i

Fig. 2, a section on the line 2-2 of Figure 1, and

Fig. 3, a rear end elevation of the burner.

Similar numerals ofreference indicate corresponding parts vthroughout the drawing.

The, burner may comprise a substantially cylindrical casing 1, having the inlet neck 2, at

its rear end portion, for connection with the f pipe 3, through which air under pressure, and preferably heated to a temperature which may be as highas 7000 Fahrenheit, is admitted to the burner.

The rear end of the casing 1 may be closed by the wall 4, and the reduced or tapered nozzle 5 is provided at the forward end thereof" An oil reservoir 6 is formed in the casing 7, which is located in asuitable opening 8 provided in the top of the nozzle 5, said casing being preferably7 provided with a lug 9 by means of which the same is connected, as by the screw 10, to the casing 1. Oilis supplied to the reservoir 6 as bythe pipe 11 leading from any suitable source ofsupply.

1, 1925. serial No. 59,879.

the tendency of the oil to clog up and stop the flow from the reservoir into thenozzle, which is common in the usual construction of burners in which tubes feed the oil into the nozzle, and with hot air surrounding the tubes the oil inside of the same is burned or charred until the tube is soon stopped up and made useless. lVith these open troughs it Vhas been found'that thisl tendency to burn or char the oil is reduced to a minimum and should the trough become stopped up the same may be easily and readilyl cleaned.

The air blast passing aroundfthese troughs induces a vacuum around the open sides of the same, causing a mixture ofthe oil with the air before reaching the lower ends of the troughs.

In order to overcome this difficulty, and to produce an equilibrium which will permit the 'oil to flow down the troughs by gravity or pressure, the oil reservoir or oil supply may be connected to the interior of the casing 1 as by a pipe 13, the inner end of which may be extended into said casing and beveled as at 14 to deflect a portion of the air blast through 'said pipe and intothe oil reservoir.

For the purpose of controlling the flame, a ring 15, preferably of triangular cross sectional shape, may be mounted for longitudinal adjust-ment within the nozzle. Thisring may be adjusted by meansof the stem 16, to which it is connected as by the spider or yoke.

17, said stem being slidably located through `a suitable opening in the rear wall 4 and through the bracket 18, the outer end thereof carrying a nut 19 through which is located the threaded stem 20, turned as by a hand wheel 2l. 1 i y VvA blast gate 22 may be slidably mounted upon the stem 16 and arranged to be moved longitudinally within the interior of the casu ing 1 asby the rod 23 which is slidably mountioo ed through the wall 4 and bracket 18 and provided with a pivoted ratchet bar 24 arranged to engage a stop 25 carried at one side of the casing.

From the above it will be obvious that a continual supply of preheated oil is fed into the nozzle where it is atomized by the incoming heated air, the open troughs substantially preventing clogging or stopping of the How of oil to the nozzle while the creation of a vacuum on the open sides of the troughs is prevented.

I claim:

l. An oil burner including a casing having a. nozzle at one end, an oil reservoir in the wall portion of the nozzle, an open trough extending from and communicating with the reservoir and extending into the nozzle, said trough being spaced at its sides from the Walls of the nozzle and means for producing a blast of air through the nozzle.

2. An oil burner including a casing having a. nozzle at one end, an oil reservoir in the wall portion of the nozzle, an open trough communicating with the reservoir and extending into the nozzle, means for producing a blast of air through the nozzle and means for providing a communication between the air blast and the oil reservoir.

3. An oil burner including a casing having a nozzle at one end, an oil supply, and an open trough mounted in the wall portion of the nozzle extending from and communicating with the oil supply and extending forwardly from the nozzle wall toward the central portion of the nozzle opening, the trough being spaced at its sides from the walls of the nozzle.

4. An oil burner including a casing having a nozzle at one end, an oil supply, and a trough open upon its side adjacent the nozzle opening mounted in the wall portion of the nozzle extending from and communicating with the oil supply and extending forwardly from the nozzle wall toward the central portion of the nozzle opening, the trough being spaced at its sides from the vwalls of the nozzle.

5. An oil burner including a casing having a nozzle at one end, an oil supply, an open trough mounted in the wall portion of the nozzle extending from and communicating with the oil supply and extending forwardly from the nozzle wall toward the central portion of the nozzle opening, the trough being spaced at its sides from the walls of the nozzle, and means for producing a blast of air through the nozzle. l

6. An oil burner including a casing having a nozzle at oneend, an oil supply, a trough onen upon its side adjacent the nozzle opening mounted in the wall portion of the nozzle extending fromV and communicating with the oil supply Vand extending forwardly from the nozzle wall toward the central portion of the nozzle opening, the trough being spaced at its sides from the walls of the nozzle, and means for producing a blast of air through the nozzle.

7. An oil burner including a casing having a nozzle at one end, an oil reservoir in the wall portion of the nozzle, open troughs communieating with the reservoir and extending into the nozzle, said troughs being spaced at their sides from each other and from the walls of the nozzle, a `pipe communicating at its forward end with the reservoir and at its rear end with the interior of the casing in rear of the troughs, and means for producing a blast of air through the casing.

In testimony that I claim the above, I have hereunto subscribedmy name.

ROBT. C. HOPKINS. 

